On Mar 26, 2009, at 5:59 AM, Ivan Ricotti wrote:
I suspect that some windows users in my network is sending spam... and the question is: how can I prevent this acting on postfix?
Two options. 1, Eliminate windows users from your network. 2, scan outgoing mail for spam before accepting it from your users, and reject accordingly.
Once you see who there is sending the spam, you may then use the appropriately sized hammer.
